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diff --git a/src/cpu/rubytest/Check.hh b/src/cpu/rubytest/Check.hh
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+
+/*
+ * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
+ * Copyright (c) 2009 Advanced Micro Devices, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef CHECK_H
+#define CHECK_H
+
+#include "mem/ruby/common/Global.hh"
+#include "mem/ruby/common/Address.hh"
+#include "mem/ruby/system/NodeID.hh"
+#include "mem/protocol/TesterStatus.hh"
+#include "mem/protocol/AccessModeType.hh"
+#include "cpu/rubytest/RubyTester.hh"
+class SubBlock;
+
+const int CHECK_SIZE_BITS = 2;
+const int CHECK_SIZE = (1<<CHECK_SIZE_BITS);
+
+class Check {
+public:
+  // Constructors
+  Check(const Address& address, 
+        const Address& pc,
+        int _num_cpu_sequencer,
+        RubyTester* _tester);
+
+  // Default Destructor
+  //~Check(); 
+  
+  // Public Methods
+
+  void initiate(); // Does Action or Check or nether
+  void performCallback(NodeID proc, SubBlock* data);
+  const Address& getAddress() { return m_address; }
+  void changeAddress(const Address& address);
+
+  void print(ostream& out) const;
+private:
+  // Private Methods
+  void initiatePrefetch();
+  void initiateAction();
+  void initiateCheck();
+
+  void pickValue();
+  void pickInitiatingNode();
+
+  void debugPrint();
+
+  // Using default copy constructor and assignment operator
+  //  Check(const Check& obj);
+  //  Check& operator=(const Check& obj);
+  
+  // Data Members (m_ prefix)
+  TesterStatus m_status;
+  uint8 m_value;
+  int m_store_count;
+  NodeID m_initiatingNode;
+  Address m_address;
+  Address m_pc;
+  AccessModeType m_access_mode;
+  int m_num_cpu_sequencers;
+  RubyTester* m_tester_ptr;
+};
+
+// Output operator declaration
+ostream& operator<<(ostream& out, const Check& obj);
+
+// ******************* Definitions *******************
+
+// Output operator definition
+extern inline 
+ostream& operator<<(ostream& out, const Check& obj)
+{
+  obj.print(out);
+  out << flush;
+  return out;
+}
+
+#endif //CHECK_H